Vehicle hoist



C. E. ALEXANDER April 28, 1953 VEHICLE HOIST Filed Feb. 7, 19 50 3 Sheets-Sheet 1 Charles E. Alexander INVEN TOR.

April 28, 1953 Q5. ALEXANDER VEHICLE HOIST 3 Sheets-Sheet 2 Filed Feb. 7, 1950 Charles E. Alexander mmvron.

BY m

April 1953 c. E. ALEXANDER 2,636,619

VEHICLE HOIST Filed Feb. 7, 1950 '3 Sheets-Sheet 3 Charles E. Alexander IN VEN TOR.

Patented Apr. 28, 1953 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to new and useful improvements and structural refinements in vehicle hoists, and the principal object of the invention is to facilitate convenient and expeditious loading and unloading of material on and from a truck, a trailer, or a similar vehicle.

This object is achieved by the provision of the instant hoist which is intended to be mounted upon a vehicle chassis, an important feature of the invention residing in the provision of means for raising and lowering the boom of .the hoist so that when lowered, the boom does not project to any great extent above the vehicle body and, therefore, does not interfere with the passage of the vehicle under low overhead clearances.

Some of the advantages of the invention reside in its simplicity of construction, in its convenient and expeditious operation as aforesaid, and in its adaptability to installation on vehicles of different sizes and types.

With the above more important objects and features in view, and such other objects and features as may become apparent as this specification proceeds, the invention consists essentially of the arrangement and construction of parts as illustrated in the accompanying drawings, in which:

Figure 1 is a fragmentary side elevational view of a vehicle, showing the invention in situ thereon,

Figure 2 is a fragmentary top plan view of the subject shown in Figure 1,

Figure 3 is a vertical sectional view of the invention,

Figure 4 is a fragmentary sectional view, taken substantially in the plane of it in Figure 1,

Figure 5 is a fragmentary side elevational view showing the lower end portion of the hoist standard,

Figure 6 is a fragmentary sectional view, taken substantially in the plane of the line 66 in Figure 3,

Figure 'l is a perspective view of a winch crank used in the invention, and

Figure 8 is a fragmentary end view, taken substantially in the plane of the line 8-8 in Figure 1.

Like characters of reference are employed to designate like parts in the specification and throughout the several views.

Referring now to the accompanying drawings in detail, the general reference character [0 designates a vehicle, such as for example, a,

2 in the provision of a hoist designated generally by the reference character [6.

This hoist embodies in its construction a vertically extensible standard It. consisting of a lower or outer section 20 and an upper or inner section 22 which is slidably telescoped in the lower section 26 so that the height of the standard may be increased or decreased, as desired.

The lower end of the lower section 20 is secured by welding, or the like, to the vehicle chassis l2, and. it is to be noted that the two standard sections 20, 22 are hollow and preferably polygonal in cross sections (see Figure 4) whereby relative rotation thereof is prevented.

Diagonal struts 24 may extend from the lower section 26 to the chassis I2 for the purpose of reinforcing the entire standard, and it is to be noted that a substantially horizontal bearing plate 26 is secured in the upper section 22 adjacent to the upper end of the latter, and is provided with a central aperture or opening 28, the purpose of which will be hereinafter more fully described.

A tubular collar 30, in turn, is rigidly secured to the upper surface of the plate 26 and the lower end portion of a tubular, upright mast 32 rotatably engages this collar or sleeve and rests upon the upper surface of the plate 26 while being encased by the upper end portion of the upper section 22 of the standard, as is illustrated in Figure 3.

A laterally projecting, tubular boom 34 con .mast and preventing any possible sagging.

It will be apparent from the foregoing that by virtue of the rotatability of the mast 32 with respect to the upper section 22 of the standard l8, the boom 34 may be swung from one side of the vehicle chassis to the other as is indicated by the phantom lines 44, 46 in Figure 2. Moreover, by virtue of the extensibility of the standard I8, the boom 34 may be lowered and raised so that, in its lowered position, it does not project to any great extent above the body of the vehicle l6, and the vehicle is thus able to travel under restricted overhead clearances notwithstanding the presence of the hoist. Raising and lowering of the mast and the associated boom is effected by means of a manually operated ard section 2% and the free end of the cable is suitably anchored to a lug E l. This lug, which is afilxed to the lower end portion of the inner or upper section 22 of the standard: id-is slidable vertically in a slot 56 provided in the outer or lower standard section 20, itlceing' apparent that by simply rotating the winch drum til, the

standard section 22 as well as the associated mast 32.,v and boomsiid. may be lowered orraised as desired. However, the winch .unit it f'rnay be looked against undesired lowering-movements by means of. a ratchet '68; secured to the shaftf52 and engaged by a pawl lilpivoted to the standard as at 12,- as is best illustrated in Figure 5. A removable hand crank 14 is used for-rotating the winch unit 48,- this hand crank being provided with opposing slots 15" for engagement with a transverse, projecting pin Iii with which the shaft Jill's-equipped, substantially as shown.

Raising-and lowering of the load is effected by means ofa second winch unit which is mounted-on the chassis i2 and is operatively connected to a power take-oil shaft 32 of the vehicle, the winch unit 8B having a hoisting cable El i. which passes through, an opening 36', into the standard 18'. The opening 8% is provided in the lower end portion of the lower standard section liland a guide pulley 38' is rotatably mounted in a bracket unit Win the opening Bil; so that the cable. t l may engage the guidefipulleyte and extend upwardly in the standard throughthe aforementioned aperture 28 intothe mast 32, as is best Finally; it is to benoted that, transverse straps l lee, tilt areprovided on thepulley brackets Elli; fit and 98, respectively, adjacent to'butlspaced i from the peripheries of the respective pulleys 88, 22, 6, so to prevent the cable B l frornbecorning disengaged from those pulleys while traveling through, the interior of theLStandaI'd, mast and.

boom.

It is believed that the advantages and use of the invention will be clearly apparent from the foregoing disclosure and accordingly, further description thereof at this point is deemed unnecessary.

While in the foregoing there has been shown and described the preferred embodiment of this invention, it is to be understood that minor changes-in the details of construction, combinationvand arrangement of parts may be resorted to without departing from the spirit and scope Ofuthe invention as claimed.

Having described the invention, what is claimed as new is:

In a hoist; the combination of a vertically extensible standard including a stationary hollow lower'sectionand a hollow upper section slidably telescopedin the lower section, said sections betransversely polygonal to prevent relative rotationvthereof, means for sliding the upper sec: tion relative to the lower section, a hollow upright mast rotatably mounted in the upper end portion. of the upper section of said standard, a hollow boom extending laterally from the upper end or 1 said mast, the lower end portion of said lower section being. provided. with a lateral opening,

guide pulley mounted in saidopening, a second guide pulley provided in the iunction of the mast and boom, a third guide pulley at the outer end of the boom, and a stationary winch provided I adjacent the lower end of saidstandard and i'n-a eluding a hoisting cableextending through said opening into the standard and passing around;

the first guide pulley, said cable extendingup wardly through the standard and said mast to engage the second guide pulley and then, passing outwardly through said boomlover the third 1 guide pulley for connection to a load,.a bearing, plate secured in a horizontal position intermedi-v ate the ends saidupper sectionandprovided with an aperture to receive said hoisting cable c anda tubular sleeve; secured to the upper surfaces; of said plate, the lower end portion ofssaid mast. rotatably'engagingsaid sleeve and resting on said plate.

CHARLES E. ALEXANDERI References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 63,03? Green Mar. 19,1867 358,558 Lathrop Mar. 1, 1887 784,586 McHahey Mar. 14., 1905 i -7,942 Covey Aug. 22,1905 1,345,364 Zied June 29,1920 1,428,387 Hescook Sept. 12, 1922 1,509,800 Vogel Sept. 23, 1924"- 1,732,191 Evans Oct. 15, 1929 

